JavaScript
let mark=80,att=90;
console.log(mark>=35 && att>=75);
console.log(mark>=90 || att>=90);
console.log(!(mark<35));Page 20 of 30
Logical Operators
AND, OR, NOT in 4 languages
1
Concept Meaning
Logical operators combine or change conditions and return true or false.
2
Real-Life Analogy
For a student to pass with eligibility, mark must be enough and attendance must be enough.
3
Expected Output
true / false decision result
4
Common Mistake
Do not confuse AND with OR. AND needs both true; OR needs at least one true.
Same Logic • Different Syntax
Code in 4 Languages
C++
int mark=80,att=90;
cout<<(mark>=35 && att>=75);
cout<<(mark>=90 || att>=90);
cout<<!(mark<35);Python
mark=80
att=90
print(mark>=35 and att>=75)
print(mark>=90 or att>=90)
print(not(mark<35))PHP
<?php
$mark=80;$att=90;
echo $mark>=35 && $att>=75;
echo $mark>=90 || $att>=90;
echo !($mark<35);
?>Memory Tip
AND = both true, OR = any one true, NOT = opposite.